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If most of the telephones/voice terminals that require remote powering are within 250 feet (76.2
meters) of the equipment room, 4-pair station circuits are run from the equipment room to the
information outlets. If this is not the case, or if the customer requires 2-point administration,
3-pair station circuits are run from the equipment room to satellite locations. Then, the 4-pair
station circuits are run from the satellite locations to the information outlets.
This section has information about
4-pair station circuits
●
3-pair to 4-pair station circuit distribution
●
Connected cable station adapters
●
Lists of telephones and consoles currently sold are provided in
and consoles
on page 70.
4-pair station circuits
Four-pair circuits, via station cables, can be run directly from an equipment room MDF to a
258A or BR2580A adapter as shown in
page 46. The 4-pair station cables connect the adapter to the information outlets.
The 4-pair station cables can be run directly from the equipment room to the information outlets
if 4-pair terminal blocks are used in the distribution field. See
room or satellite location
110-type terminal blocks.
If 110-type terminal blocks are used with a modular plug-ended station cable, an adapter can be
connected directly to the 110-type terminal block connectors. See
equipment room or satellite location
3-pair to 4-pair station circuit distribution
Figure 21: 3-pair to 4-pair satellite location connectivity
distribution from an equipment room MDF to a satellite location using 110-type hardware.
Four-pair circuits are distributed from the satellite location to the information outlets.
Three-pair circuits can also be run directly from the equipment room MDF to a 356A adapter as
shown in
Figure 22: 3-pair to 4-pair circuit distribution and connectivity
station cables connect the adapter to the information outlets. Four-pair station cables can be run
directly from a satellite location to the information outlets as previously described.
Note:
Bridged taps are not allowed on any part of the station wiring.
Note:
on page 45
on page 45
on page 50
Figure 18: 4-pair circuit distribution and connectivity
on page 47. The station cables must be field-terminated on the
on page 47.
Station circuit distribution from equipment room
Table 7: Connectable telephone
Figure 19: 4-pair run to equipment
Figure 20: 4-pair run to
on page 48 shows the 3-pair circuit
Issue 3 January 2008
on
on page 49. Four-pair
45
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